It's a little-known fact that George Lucas has a deep-rooted fear of bread. Apparently, while playing after school with some friends, one of them placed an empty bread bag over his head, nearly suffocating him. Darth Vader's breathing sounds supposedly are similar to what Lucas experienced during that prank.

A varmint will never quit - ever. They're like the Viet Cong - Varmint Cong.